For the 1975 USAC Indy Car season, Patrick Racing built it's own chassis, the Wildcat, for drivers Gordon Johncock and Wally Dallenbach. However, early in the season the team relied on their Eagles. Despite losing STP as a sponsor, the team retained the bright day-glo red paint scheme with the Sinmast Sponsorship. Wally Dallenbach managed to win a 100 mile qualifying race at the Ontario Motor Speedway in preparation for the California 500.